Data processing 18 Management 15 Design and construction 7 Marketing 7 Materials 7 Engineering 6 Signal processing 6 Strength of materials 6 Accounting 5 Automatic control 5 Control theory 5 Digital techniques 5 Production management 5 Structural analysis (Engineering) 5 Air conditioning 4 Engineering design 4 Engineering graphics 4 Heating 4 Logic circuits 4 Management information systems 4 Mathematical models 4 Telecommunication 4 Asynchronous transfer mode 3 Computer-aided design 3 Digital electronics 3 Electric circuit analysis 3 Electronic digital computers 3 Electronics 3 Equipment and supplies 3 Heat 3